Surprisingly absolutely no one, my two boys love all things Lego® and have grown particularly fond of the Lego® franchise NINJAGO. When I first broached the subject of a shared party, I asked what they wanted as a theme and Griffin immediately shouted, "NINJAGO!"
To which, Amos responded, "YEAH, NINJAGO!"
Unanimous. So, we got a NINJAGO invites (which I designed myself), NINJAGO cake, and I made NINJAGO balloons. Every kid at the party got to decorate their own karate headband and we had a karate instructor come give a quick lesson. Add a bouncy castle and you have all the ingredients of birthday party success!